The sledding hill, by Chris Crutcher

Billy, recently deceased, keeps an eye on his best friend, fourteen-year-old Eddie, who has added to his home and school problems by becoming mute, and helps him stand up to a conservative minister and English teacher who is orchestrating a censorship challenge

Billy, recently deceased, keeps an eye on his best friend, fourteen-year-old Eddie, who has added to his home and school problems by becoming mute, and helps him stand up to a conservative minister and English teacher who is orchestrating a censorship challenge